FutureLearn offers over 150 free online courses that fall within 13 categories, including technology, creative arts and engineering.

Lynda offers thousands of online courses, classes, training and tutorials to help users achieve their personal and professional goals.

National Careers Service is a government resource providing information related to jobs, training and learning.

Skillshare is working to close the professional skills gap, by providing access to thousands of online classes in areas like business, film, craft and technology.